Truck.



P. W. c. BAILEY-' TRUCK. Prnxoymox Hmm ann. 24, 190s.

- r. w. .0. BAILEY.

TRUCK.

APPLIUATION FILED SEPT. 24, 190s.

925,795. Patented Junezz, 1909.

3 SHEETS-SHEET 2.

Invenar,

F. w. c. BAILEY.

- TRUCK. PPLIOATION FILED SBPT, Z4, 190B.

Patented June 22, 1909.

3 SHEETS-SHEET' 3:

` Inventar, ff fk M@ Attorney.

' UNITED STATES PATENT FREDERICK W. C. BAILEY, OFy KNOXVlLLE, TENNESSEE.

Specification of Letters Patent.

.Patenten 'Jane 22,1909.'

Applcation ledxseptember 24, 1908. Serial No. 45,4,50L .f

:To all whom it may concern:

' Be it knotvn that I, Fienneiueii WV. C. BAILE, a citizen'of the United States, .re-

- siding Vat Knoxville, in the county of .Knox

and Statel of Tennessee, have invented anew and useful Improvement in Trucks, of

which the following is a specification, reference. beingjhad to the accompanyingy drawlngnj:A l:

improvement relates particularly to tilting trucks used for transporting coulentt-.ers -and similar machines in coal mines.'

The ,object ofjthe improvement is to pro'- "vvide'such a' truek'ada-pted for use in mines having'low ceilings.

f home ofthe' trucks now in use for transform being 'adapted to reoe'ive thereon a coal cutting maohme, said maohlne l'ieing-d-rawn or slipped endwise upon one end' of the truck platform, after said platform has been vtiltedon vthe axle of the Wheels adjacent said vto leave insullicient room for receiving and Vunloadlnsrthe cuttingA machine when the end until said *end has been lowered'close to or upon the ground or upon the track upon which the truck stands. This form iso-bjectionahle, because' such tilting-brings the raisedlend of thetruck platform so high as 'ceiling et the mine "is low,' andbecause the onlvtito wheels, the Wheels underthe raised portion oflthe "ing it at the forward Wheels, relative to the ax'ial line of said Wheels, until the front of the platform rests on the track or ground.

truck -isrendered unstable b v being putupon platform being lifted from ln the accompanying drawings, Figure l l `is 'aside elevation'of fa truck embodying my i rimlimito-nent, the forward portion of the platform being atv its normal-elevationg Fig.

f' 15in-"similar velevation, the vfront portion .of ohef'platform being' lmveredso as `to hear- "uponsthe ground; "Fig. 3 isa plan of the verse plate, G.; yaiidfoblique.floriees, "fare 'ftru'ek shown vin Figs., land Q,; portionsbeingl vbroken away';'jl"ig. d is afsection :on the line.;

of Fig, 3, looking in thedirectionof the arrow: Fig. 5 is a side `elevation of a 'lever used in changing the elevation of the. front portion of the truck platform; Fig. 6

' to eaeh-other'and inust move i"n'unison'-4 is .-1 side elevation of a truck embodying'my improvement in another form;-Fig./7V is a section on the line'7-7 of Fig; 6,;lo'oking in the direction of the arrow; FigoB-isalseo- `tion on the line 8 8 offFig?,T lo'okinginvv the direction of the arrowi/ Referring lirst to Figs'. 'to 5, inclusive, l, 'R are track rails Whichsnpport the truck lwheels, lV; f"

For convenience in descriptiomthe'end of f the truc-k at the left inLFigs. 1l,1=2,ffand 3 will be herein designated as the forward end'of the truck", and the pair of Wheels 'at-thefleft 'will be termed Athe? forward Wheels, While.

the opposite or right hand end -oftheftr'uck will be designated. as-thejrear'f end of' the truck and the pair of Wheels, XV, at theright will be designated as the rearWheels.; i'

l`hejforivard Wheels, l-suppotrt anf'anle, n, and the rear Wheels, W, support an axle,f

l); l:and said axles support' the approximately` horizontal frame or platform, C, saidaxles resting in bearings, D, on the lovver'pontion of the platfi'nm. f

The rear axle is-straight frontend tofend, and in the form shown in the drawings, the

. wheels, XV, surrounding said r`aXle-' a"i'-e sesaid axle and said Wheels are'"C'ie'e'uredrigitill);A

Huw :te The forward axle, Aistaferanle-an efor shaft having near enel-r end 4a eranl,f`2," on'- which is a journal, viextending*loosely through the hub of the n'heel,-"\V. -Inthe projecting portion' of said journal' is'fa'c0t1' .ter pin. lit, ivhieh serv-es onsaidl journalA The frain'e or platform, l), is approxi# matelyv rectangular, but the drawings shovy,T the forward portionor end 'widen'edi'f-Ili each side ofthe platform and adjacent.' the wheels. XV," said frame coniainsla s iderail, .,\\'hieh.is formed ofy anglejiron having a lower horizontal flange, 5, dire' cted 'toward the opposite rai-l, and an upright tlan'gefb, rising from the fanffe;'fg-Theear en'dsof saldi-aile Lare joined` byahoriz'on't'a'l trans' to "retain said *Wheel 9, joins said rails. Adjacent each ofsaid rails, a plate,

y to, and parallel -to the ,middle longitudinal line of he truck are two bars, 11, which ex- 8 and 9, and are secured thence forward. The forward ends of said-bars, 11, are joined by a cross bar, 12. In each angle of the straight portion of the side rails, 5, is a strengthening plate, 13. Inasmuch as this platform has been heretofore used in such trucks, I deem it unnecessary to describe it further.

Between one of the wheels, W, and the adj acent crank, 2, a lever, 14:, surrounds the j ournal, 3, and rests flat'wise against the transverse arm of said crank and is secured thereto by 'a screw, 15, extending through an aperture, 16, in said lever into said portion of the crank. Thus said lever is made rigid with tend across the bars, thereto and extend vthe crank or with the crankshaft, so that Y .f when said lever is moved in a plane transscrew, 21. The upper said spring may verse to the crank shaft, 'said shaft is rotated according to the arc through which said lever moves. A latch block, 17, is secured to the outer side of the adjacent side rail', 5, forward of said crank shaft by means of rivets, 18. In said block is a recess, 19, adapted to receive said lever. A blade spring, 20, extends across said notch and is secured to the block below said notch by a end of said spring is turned outward, and the portion of' the block above 'said notch is slightlytapered, so that when said lever is pressed downward, it will readily pass between said block and said spring, crowding the latter outward, until said lever rests insaid notch'. When said lever 'is once in said position, said spring will hold it there until the lever is moved outward by a force sullicient to overcome said spring. However, if so desired,

'14, made laterallyiiiexible and set so as to require outward flexing to move it into said engagement between .block and. allowed to notch when the lever is moved downward. In the form shown in the drawings, the relation of the parts is such as that when the crank shaft is in an approximately horizontal plane, said lever will be in approximately a .horizontal position and engaged in said latch block, and in such position, the

the frame and the forward axle is at the same height as the engagement betweenl the frame and the rear axle, so that the frame is held at approximately the horizontal position. '(See Fig. 1.) For lowering the front of the platform, the lever, 14, is released from the latch follow the course of the arrow in Fig. 1, the load on the crank axle bearing the latter downward until its lower limit is reached o r until the forward .end of the platform (the portion composed of the bars, 11, 11, and the cross bar, 12) bears upon the ground.' (See Fig. 2.)

be omitted, and the lever,

mechanical power.

' extends a, sprocketchain,

from a motor It will be observed that, by thus making the front axle a crank axle, the horizontal transverse pivotal line of the truck platform is transferred from the front axle to the rear' axle, by frame which dips downward (the portion forward of said pivotal line) is lengthened, while the portion which tilts upward (the portion rearward of said pivotal line) is shortened. )ind it will be seen that because of the lengthening ofthe portion of the platform forward of said pivotal line, .the angle of movement required to bring the forward end downward into contact with the ground is much reduced, and that, for that reason, the angle of movement of the portion of the platform rearward of said pivotal line is much reduced, and that, furthermore,

the distance through which the extreme rear endvof the portion of t-he platform rearward of said pivotal line moves is much reduced by the shortening of saidportion. to the exvtent /of lthe distance between the two wheel axles. Through these two factors, the rear end of the platform is, when the platform is tilted, left materially lower than when the platform is tilted on the front axle; and such dierence in elevation is important in mines having low ceilings. And, in a secondary way,

cause the slant of the platform as a whole is less when the platform is tilted on the rear axle, b.ud it is therefore easier to draw the coal cutter or other mining machine from theo-round upon said frame. Furthermore the four supporting wheels are left upon the rails and the truckis therefore more stable during the loading operation than would be the case were two of said wheels lifted from the rails.

In Fig. 1, the dotted lines indicate in a general way the position of the cutting machine upon the truck. Usual-ly the horizontal flanges, 5a, of the side rails, 5, form ways upon which the machine moves.v

In some cases -the machine is drawn upon the truck by hand and in some cases by In some cases this mechanical power is furnished by the motor on the cuttingmachine. In Figs. l, 2, and 3, a portion of the gearing used in propelling the truck by power transmitted from the cutting machine is shown. A. shaft, 22, rests in a bearing, 23, on Aone end of which is a spur gear'wheel, 24, and on the other end of which isa sprocket wheel, 25, from which 26, to and around a sprocket wheel, 27, on the rear axle, B. At the opposite side of the truck is a sprocket chain, 28, surrounding a sprocket wheel, 29, on the rear axle, B, and a sprocket wheel, 30, on the side of the supporting wheel, W, on the adjacent. end of the forward axle, 'A'. Power applied to the spur gear wheel, 24, on the cutting machine will,

which means the portion of the" low the axle, by two screws, lever 1s arranged to be engaged by the latch above the axle.

as wil-l be readily understood from an inspection of the drawings, propel the truck byl In 'the form illustrated in Figs. (S, 7, and' 8, the platform and the rear' axle are the same as in the form illustrated by` Figs. 1, 2, and 3; .but the forward axle, F, is Astraight and keyed to the wheels, just as is the case whit-h'the rear axle and rear wheels. A campiece, G, surrounds the axle F, and has eccentrics, 32, resting in relatively large bearings, D, applied to the lower sides of the side rails, 5, 5, of the'truck platform. A lever, 33, similar to the lever, 14, is applied to the outer end of one of the eccentries, be-

nd said block, 1T. Said lever is preferably so set as tofmove through approximately a half a circle in turni-ng the cam piece, inorder that the major portion of said cam piece maybe moved from below the axle until it rests In this manner, the maximum of lift maj7 be imparted to the front portion of the truck platform by an eccentric'liaving a certain difference in radii.

I claim as my invention:

l. In a tilting truck, the combination with a low, horizontal track latforni, of two pairs of supporting whee s, mechanism for.

joining one of said pairs of wheels to said platform, and vmechanism for joining the other pair of said wheels to said platform for` up-and-down adjustment of the platform, substantially as described.

In a tilting truck, the combination with a low, horizontaltrack platform, of two -pairs of supporting wheels, mechanism for joining one of said pairs of wheels to said platform, and 'mechanism including a locking, lever for joining the other pair of said wheels to said platform for up-and-down adjustment of the platform7 substantially as described.

3. In a tilting truck, the combination with a low, horizontal track platform, of two pairs of supporting wheels, mechanism for joining one of said pairs of wheels to said platform, a crank vaxle oining the other pair of said wheels to said platform, and means for partially rotating said crank axle, substantially as described.

4. In a tilting truck, the combination with a lowl` horizontal track platform, of two pairs of supporting wheels, mechanism for a of joining one of said pairs of wheels to said platform, a crank axle joining the other pair of said Wheels to said platform, a lever for turning said crank axle, and means for locking said lever, substantially as described.

5.- In a tilting truck, the combination with a low, horizontal track platform comprising side rails, two pairs of bearings on said platform, an axle resting in one pair of said bearings, a crank axle resting in the other pair ofPsaid bearings, and supporting wheels on said axles, substantially as described.

6. In a tilting truck, the combination with latform comprising side rails, two pairs in one air of said bearings, a crank axle resting m the other phi-r of said bearings, supporting wheels on said axles, and a locking lever combined with said crank axle for partially turning the latter, substantially as described.

'7.' In atilting truck, the combination with a platform, of two pairs of supporting wheels, mechanism joining one 'pair of said wheels to said platform, a crank axle having journals extending into the other pair of supporting wheels, and a Vlocking lever surrounding one of said journals and joined to said crank axle adjacent said journal, substantially as described.

8. In a tilting truck, the combination with a low, horizontal track platform, of a crank axle, supporting wheels on the journals of said axle, and power transmitting mechanism applied tojsaid wheels, substantially as described.

9. In a tilting truck, the combination with a low, horizontal track platform, of a crank axle, supporting wheels on the journals of said crank axle, a sprocketwheel applied to one of said supporting wheels, and a sprocket chain applied to said sprocket wheel, substantially as described.

10. In a tilting truck. the combinationwith a low, horizontal` track platform broadened at its forward end, of two pairs of supporting wheels, mechanism for joining one of said pairs of wheels to said platform, and mechanism for joining the other pair of said wheels to said platform for up-anddown adjustment of the platform, substantially as described.

In testimony whereof I have signed my name, in presence of two witnesses, this 21st.

day of September, in the year one thousand nine hundred and eight.

FREDERICK lV. C. BAILEY.

li'itnesscs: y A

'Gratis Keim, (l. .L loasn.

llO 

